Found another thread showing best bfg for Zeusminer was 4.0 so that's what I'm running. Been playing with MultiMiner but couldn't even get it to see the Zeus. BFG does but it's getting 98% hardware errors

Using .\bfgminer.exe --scrypt -S zeus:\\.\COM13 --url %URL% --user %cgUSER% --pass x --set zus:chips=6 --set zus:ignore_golden_nonce=1
Any ideas? Thoughts? Suggestions? Should I just get 5.0? Are my switches wrong? Do I need to specify the COM or just let it find it and if so with what?